Cursor keeps selecting vertices through the mesh without X-Ray on
Looks like a bug. First thing to do would be to make sure GPU drivers are up to date. Also try 2.83 version, see if maybe that is fixed already.
You could also see if enabling or disabling OpenGL Depth Picking has any effect on the issue:

If the problem persists, you should probably report it as a bug providing as much detailed info as possible.